Eyeglasses and spectacles.



F. HAMILTON mamma Asylum Ma MEG'FAGLES.

Patentf Ap 1913.

A Nok/ufr sTATirs PATENT onirica. i

i FREDERICK. HAMILToN, or.Ienovninnen,A RHODE ISLAND.

y MB ontt may, concern a iti/zen of the 4T lnited States, residing et `Providence, in the county of Providence and State of `Rhode Island, have invented certain .p new and'y useful ,i Improvements in Eyeglasses aiidspectacledof which the folf ulowing,isa specification.

My invention-relates toimprovements in spectacles and'eyeglasses and has for its ob ict tovprovide an improved construction of 'lens clamp or attachment but it is also apfrilicuhfle to other uses. y

v inyeiitionlcomprises a ltired ear, an

iblae'aradapted to accommodate vari- ...iiclni'esses'ot lenses, means for preventing the. lens screw from coming in contact ,-giyithfthe lens., and means for preventing rolve'nieht ofthe lens around the lens The obgect of my invention is to provide .ineens `aiofrholdingthe lens `securely in place,

said", means bflgA ndapte'd to4 prevent the screw, fromworkingloose.and to preprovided on thek periphery oi' a lens to hold` helene against movement but I am not aware that prior to my invention means have .been l.adopted to prevent the screw frein'doiiiing" in `contact with the lens and at the saine time preventing motion of the lens around the lenslscrew.

Careful studyof the art has shown that one of the greatest cliiicultiesto be contended 'with in rimless eyeglasses is the looseuing of lenses. This is of great importance in lenses such as cylinderswhere the` axis oi' the lens must be retained` in a pre.-

deterinined position before the wearers eyes, any detlection or deviation from this pesition. causing `the prescriptive eitectot` the lens to-be lost. Investigation of the subject, has shown that'the working loose of lenses and the backing out of the screw 1n the majority of cases is due to the fact that;

the lens straps or ears, embracing the edge oit the lens are forcedback due to the long everage-ot the lens with' the screw as a ful- Specification of Letters Patent. Applicatie inea sugustii, 19,11. semi No. 643,546.. i

mown that I,l FREDERICK HAMIL-4 fvent/the lensy from fworking' .about the lens Patntednpr. 22,1913;

crum, the wearer usually taking the lenses by theouter edges and adjusting them to i the nose.' This handling ofthe lenses even-` tually `toi-ces back the strap and the lens, bee comes L loose and works in the strap.

working in the strap will causethelens 1to carry the screw around iwith it 'and in time the screw itself will back out, inthis Waycausing a loosening of the lens bhth in the strap and' about thescrew.. Y Therefore,

Yit is apparent that the means adopted must perform a double function, that is,` the screw I must be prevented from backing outV if the strap becomes loose, and means must be provided to hold the lens in fixed position with around the screw attachin `ineans as'a "fiilcrun'i, and it is for the obtaining of this dual function that I have designed Iny z lens clamp.

relationto the `strap or else it will4 work study of th Conditions will disclose the fact that it the lens is hold ri idly'at `its periphery or in the strap, even t e slightest Working `at that point will allow a Inovement around the-screw and this movement will tend to back out the screw unless there` .is something interposed betr-.reen the screw and the edge of the hole in the lens. There. fore, the edge attaching means andthe screw attaching means must workin cooperation with" each otherto perform the ideal condition which I do not believe 'has been done prior to my invention.

With these and other `objects in view `the invention 4consists in the novel construction and arrangement of parts hereinafter d escribed, `delineateclin the drawings and specifically claimed, it being understood that changes properly fall-ing within the scope of what is claimed may be made without departingqfrom the spirit of my inv'en` tion.`

Similar numerals of reference are emioni` `the edges of the hole, 2 in the lens a is a 'longitudinal sectin tln'ough'the clamp yshowing the lens securing means inset int'o,

ear and the retaining arm secured to the ad' justablee'ar. 1 I

Referring speciical-ly to the drawings: The lens l is provided with the usual liole 2 to receive the lens s crew 3 and has in its periphery or edge a recessetv adapted to receive the retaining arm 5 of the lensclamp.

'Ihisretaining arm 5 may beintegral with the fixed ear 6 as shown in' Fig. IV. or it may be integral with the adjustable ear 7 as shown n'Fig V; The retainingarm has a attened side whiclrfits intoacorresponding recess 8 in the opposite ear to prevent rotation ofthe ear.. In'Fig. IV the recess is. in the adjustable ear 7 whereas in Fig. V the lrecess is inthe fixed ear 6. To-,prevent the screw 3 Afrom coming into contactwith i sleeve ortu'be 9 is provided inthe ixed ear, This tube may be nfthe nature of an integral bosswith the fixed canas shown in Fig. -V

or it'ma-y be a bush-ingset into the fixed ear as shown in Fig, IV. The recess 4 in the edge or periphery ofthe lens isl designed toitit the retaining arm 5 snugly so as to preventany movement of the lensA around the lens screw 3 as a fulcrum.

The clamp may be attached eyeglass bridgeconnection or spectacle temple connection. In Fig. I the clamp is shown. attached to the bridge lof a finger piece eyeglass, whereas in ,1"ig., III it.` is shown attached to the'stud connection of a spring .bridgel eyeglass. Fig. I also shows a spectacle and connection. Yr

Theparts are assembled as `follows: The lens is drilled with the recesses .2 .and 4. The bushing 9 ofthe'clampis placedwithin the recess 2. The adjustable ear is then placedonlthe oppositer side of the lens, the screwvholebeingin alinement with the screw holein the bushingthe retaining arm atthe .same time being adjusted in the recess 8.

' 1-he screw is' thenput in place .and tightened up, thus clamping the lens securely between the two ears, the bushing preventing the In testimony whereof` I affix screw from coming'in contact with-the lens and the'- retaining arm in the recess 4 pre` venting `movement ofv 'they lens around 'the bushing 9.

In operation, if there is a small amount play between the edges of the recess 4 4and the retaining arm, the lens will beallowed i,

to fulcrum around the bushing 9 but as the moving lens does not come into contact with the screw there will be no'tendency to back out this screw and loosengtheiens laterally whereas it the retaining arm'is snugly fitted in the recess 4 and the bushing v9 is also 'snugly itted,gthe'lens will be held between tivo retaining points and therev will be no tendency for it to ulcrumV about Veitherthe lscrew or the retaining arm.l l

It is apparent that several modifications may be made in the arrangement of thefretaining arm andthe bushing, some of which f have been illustrated in thedrawings- I, therefore, do not desire to be'limited to the exact details shown. A I

' Having thus described my invention, the

following is what Il claim asnew therein and y desire to secure by Letters ,Patent:

, y1. In combination with alens'- having two recesses, a lens attachment having abushing` through one recess 1and a .retaining `through the other recess,4 and. akclamp through the bushing.,

'2. In combination with a lens having i' recesses` a ,xed' ear, a'. loose ear, a clam f through one recess,.a retaining arm throng the other recess andabushngsurrounding the clamp. g 3. lIn' combination witha lens havin two recesses, 'a fixed ear, a loose4 ear, a c amp through one recess adapted to drawztheloose ear toward the fixedear, a bushing around theclamp and a-retaining 'arm.through the other recess adapted tol prevent rotation about the clamp and to hold the4 loose 'ear 1n adjustment with the iXedear. v e

my 'signature in presence of two witnesses.-

.FREDERICK ,HAMin'roN Witnesses: IN

REGINALD II.\WATERS, PAUL T. 'IRUEMAII. 

